Martin Storsjo : configure: Check for -Wno-pragma-pack.

[Alexandre Julliard]

Module: wine
Branch: oldstable
Commit: a31315fe07e90711fec794b64991728db11a30cc
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=a31315fe07e90711fec794b64...

Author: Martin Storsjo 
Date:   Mon Jan 22 00:05:35 2018 +0200

configure: Check for -Wno-pragma-pack.

Recent clang versions warn if an include file changes the pragma
pack level without restoring it before the end of the include file.

This avoids warnings for each include of pshpack*.h/poppack.h.

Signed-off-by: Martin Storsjo 
Signed-off-by: Alexandre Julliard 
(cherry picked from commit 51e2966b4b00cd128c44b413803d8e430a15d021)
Signed-off-by: Michael Stefaniuc

---

configure    | 25 +++++++++++++++++++++++++
 configure.ac |  1 +
 2 files changed, 26 insertions(+)

diff --git a/configure b/configure
index 848e4c2..c6e876b 100755
--- a/configure
+++ b/configure
@@ -14452,6 +14452,31 @@ $as_echo "$ac_cv_cflags__Wno_packed_not_aligned" >&6; }
 if test "x$ac_cv_cflags__Wno_packed_not_aligned" = xyes; then :
   EXTRACFLAGS="$EXTRACFLAGS -Wno-packed-not-aligned"
 fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wno-pragma-pack" >&5
+$as_echo_n "checking whether the compiler supports -Wno-pragma-pack... " >&6; }
+if ${ac_cv_cflags__Wno_pragma_pack+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_wine_try_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS -Wno-pragma-pack"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(int argc, char **argv) { return 0; }
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_cflags__Wno_pragma_pack=yes
+else
+  ac_cv_cflags__Wno_pragma_pack=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+CFLAGS=$ac_wine_try_cflags_saved
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cflags__Wno_pragma_pack" >&5
+$as_echo "$ac_cv_cflags__Wno_pragma_pack" >&6; }
+if test "x$ac_cv_cflags__Wno_pragma_pack" = xyes; then :
+  EXTRACFLAGS="$EXTRACFLAGS -Wno-pragma-pack"
+fi
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wshift-overflow=2" >&5
 $as_echo_n "checking whether the compiler supports -Wshift-overflow=2... " >&6; }
 if ${ac_cv_cflags__Wshift_overflow_2+:} false; then :
diff --git a/configure.ac b/configure.ac
index 62f5aa9..b768d05 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1768,6 +1768,7 @@ then
   WINE_TRY_CFLAGS([-Wempty-body])
   WINE_TRY_CFLAGS([-Wignored-qualifiers])
   WINE_TRY_CFLAGS([-Wno-packed-not-aligned])
+  WINE_TRY_CFLAGS([-Wno-pragma-pack])
   WINE_TRY_CFLAGS([-Wshift-overflow=2])
   WINE_TRY_CFLAGS([-Wstrict-prototypes])
   WINE_TRY_CFLAGS([-Wtype-limits])